Taegutec, Ltd.

Dae Yeop Lee

Sung Su Chun

Geun Ho Park

Chang Hoon Hong

A SiAlON composite includes a SiAlON phase including &#x3b1;-SiAlON phase, &#x3b2;-SiAlON phase and grain boundary phase. The SiAlON composite is prepared from a starting powder mixture including a silicon nitride powder and at least one powder providing aluminum, oxygen, nitrogen, yttrium (Y) and erbium (Er) to the SiAlON composite. The SiAlON composite contains the SiAlON phase of at least 90 vol %, z-value of the &#x3b2;-SiAlON phase ranges between 0.27 and 0.36 and thermal diffusivity of the SiAlON composite is equal to or greater than 2.4 (mm/sec) and equal to or less than 5.2 (mm/sec).

Sialon composite and cutting tools made thereof

A ceramic material includes of &#x3b2;-sialon (SiAlON), polytype 15R, an intergranular phase, and yttrium. The polytype 15R includes twin grains.

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Daegu, South Korea

Dae Yeop Lee